Overview of lesson, including: where it fits in unit, what are key ideas and what will students be doing.
Opportunities to Learn:
Depth of Knowledge
Prerequisite Knowledge
E & M Review: optional if time allows Electricity and Magnetism: Oersted, Farady, Ampere, Review and Summary Induction Effects (Oersted, Farady, Ampere) Inductance, Capacitance, Resonance
Plans for Differentiating Instruction
Accommodations and modifications
Environmental factors
Materials
Objectives:
Instruction:
Opening:
Light
Light travels as waves, much like Sound but with some differences.
Unlike sound, light can travel through a vacuum. At first, scientists could not figure out what carried the waves, but the answer was something they already knew about:
A Light Wave travels as a combination of an Electric Field and a Magnetic Field, both of which can travel through a vacuum.
Remember that a changing Electric Field creates a Magnetic Field,
while a changing Magnetic Field creates a changing Electric Field.
A light wave begins with an oscillating electrical charge, which creates the two changing fields. As they change, they carry the wave forward.
Unlike sound, light is a Transverse Wave, with vibration cross ways to the direction of travel.
But just like sound, light can have Constructive and Destructive Interference, Standing Waves, Nodes, and Antinodes.
And like sound, light has Frequency, Amplitude, and Wavelength.
As with sound wavelength is speed divided by frequency, but here the speed is much higher and the wavelength is much smaller.
Although light can travel through a vacuum it also travels through many materials, and the speed of light is different in for instance, vacuum, air, water, or glass.
Like sound, there are frequencies of light too low or too high for humans to see them, and some animals have a better range, but others do less well than we do. We see different frequencies as colors.
The speed of light through a material is slightly different for each frequency.
Just like sound, the direction of travel changes when light moves into a material with a dfifferent speed. So the direction will be different for each color. This allows the colors to be separated, as in a rainbow.
Our eyes have sensors to detect light, on a surface at the back of the eye, called the retina. There are many thousands of sensors, on this surface, so that we can see detail in what we look at. Film or a sensor array in a camera works the same way.
Because the most important thing is having lots of sensors for details, there is not room to have sensors for every possible color. Instead we have sensors for just three colors, red, greem, and blue, and these are repeated all across the retina. In combination, they can approximate any color we may see. Cameras work the same way.
Lesson Plan
Lesson Title: What Carries the Waves?
State Standards: GLEs/GSEs
National Standards:
Context of Lesson:
Overview of lesson, including: where it fits in unit, what are key ideas and what will students be doing.Opportunities to Learn:
Depth of Knowledge
Prerequisite Knowledge
E & M Review: optional if time allows
Electricity and Magnetism: Oersted, Farady, Ampere, Review and Summary
Induction Effects (Oersted, Farady, Ampere)
Inductance, Capacitance, Resonance
Plans for Differentiating Instruction
Accommodations and modifications
Environmental factors
Materials
Objectives:
Instruction:
Opening:
Light
Light travels as waves, much like Sound but with some differences.
Unlike sound, light can travel through a vacuum. At first, scientists could not figure out what carried the waves, but the answer was something they already knew about:
A Light Wave travels as a combination of an Electric Field and a Magnetic Field, both of which can travel through a vacuum.
Remember that a changing Electric Field creates a Magnetic Field,
while a changing Magnetic Field creates a changing Electric Field.
A light wave begins with an oscillating electrical charge, which creates the two changing fields. As they change, they carry the wave forward.
Unlike sound, light is a Transverse Wave, with vibration cross ways to the direction of travel.
But just like sound, light can have Constructive and Destructive Interference, Standing Waves, Nodes, and Antinodes.
And like sound, light has Frequency, Amplitude, and Wavelength.
As with sound wavelength is speed divided by frequency, but here the speed is much higher and the wavelength is much smaller.
Although light can travel through a vacuum it also travels through many materials, and the speed of light is different in for instance, vacuum, air, water, or glass.
Like sound, there are frequencies of light too low or too high for humans to see them, and some animals have a better range, but others do less well than we do. We see different frequencies as colors.
The speed of light through a material is slightly different for each frequency.
Just like sound, the direction of travel changes when light moves into a material with a dfifferent speed. So the direction will be different for each color. This allows the colors to be separated, as in a rainbow.
Our eyes have sensors to detect light, on a surface at the back of the eye, called the retina. There are many thousands of sensors, on this surface, so that we can see detail in what we look at. Film or a sensor array in a camera works the same way.
Because the most important thing is having lots of sensors for details, there is not room to have sensors for every possible color. Instead we have sensors for just three colors, red, greem, and blue, and these are repeated all across the retina. In combination, they can approximate any color we may see. Cameras work the same way.
Engagement:
Closure:
Assessment:
Reflections
(only done after lesson is enacted)Student Work Sample 1 – Approaching Proficiency:
Student Work Sample 2 – Proficient:
Student Work Sample 3 – Exceeds Proficiency: